Manufacture of zeolites.



PAUL DE JBRfiNN, or nussnrnonr, ERMANY.

marmrac'runu or zuomrns.

No Drawing.

To all whom it may concern Be it known that T, PAUL on BRiiNN, a citizen of the German Empire, residing at 54 Graf Reckestrasse, Dusseldorf, Germany,

have invented certain new and useful Improvements in and Relating to the Manufacture of Zeolites, of which the followingis a these qualities can be produced by carrying Wit out the reaction with the reagents in extremely dilute solution, and by the employment of soluble sodium salts such as sodium phosphate or sulfate chlorid in relatively considerable quantity.

The invention comprises the process which is hereinafter described and the product of the process.

lln carrying the invention into effect I make a solution in water of sodium sulfate, that is to say, for example, 6 lbs. of sodium sulfate in 12 gallons of water. I then add, for example, 844 cc. of a solution of sodium aluminate containing 45.6 ams 'of alumina, and stir upthe mixture. then add, for 'example, 315' grams of sodium silicate 4 5- Baum containing 75 grams of SiO,. I then stir up the mixture and bring it to the boil. A flocculent 'ip 'nee'ipitate is thus formed,- which I allow to settle, andpump 0d the clear liquor. form of a jelly or jelly-paste.-" The precipitate is then washed in a large volume of water, by which all adhering soluble substances are removed and the clear liquor drained 0d the waste. The precipitate is then pumped through a. filter press, and a cake is produced ready for drying. The cake produced may then be dried in a current of air as the result of which it splits" up into pieces, and after drying the substance is leached 'in hot or boiling water. The process of leaching maybe assisted by the pieces being broken up between rollers orby other suitable means, anda product Specification of Letters Patent.

the precipitating tank into a filter A substance remains in the remains-in the form of small hard grains, in which condition it is available for the softening or purification of water or for any other purpose without any further treatment. I

The precipitate may be taken direct from press and washed there.

It will. be understood that the product thus produced is in the form of hard grains and has a high and active capacity for the exchange of the soda base and that this base may be exchanged for another on merely passing through the substance a solution of a corresponding salt. It will furthermore be understood that the clear liquor from which the precipitate has been removed and which consists of a solution of sodium sulfate and sodium hydrate, may be again used, that is to say, the liquor may be neutralized with an acid such as sulfuric acid, so that it may thus consist wholly of a solution of sodium sulfate. This may be corrected in degree of concentration, that is, it may, for example, be made into a 5 per cent. solution, so that the process hereinbefore described may then be repeated. ()r again, the liquor may have added to it such a quantity of soda as is necessary to produce with the aluminium salt employed as concentrated a solution of sothe said precipitate, forming the said precipitate into a cake, and drying the cake.

2. Aprocess for the manufacture of baseexchanging substances in the wet way, con- Patented Nov. 23, 1915., Application filed July 14, 1913. Serial No. 778.977.v I

sisting in mixing solutions of alkali metal silicate and alkali metal aluminate, producing a precipitat by the resulting reaction in the form of a jelly or jelly-paste, washing the said precipitate, and passing the said precipitate through a filter press to-produce .a cake and drying the cake.

3. A process for the manufacture of baseing "a precipitate in" the form of a jelly or the cake.

4'. A process for the manufactureof, baseexchanging suhstancesin the wet way, consisting in mixing solutions of alkali metal and alkali metal aluminate, producmg a precipitate in the" form of a jelly or jelly-paste by using the said reagents in extreme dilution and in the presence of a a larger. roportion of a soluble sodium salt a filter press to produce sil cate and alka 1 than 0 both the'saidreagents,,washing the said precipitate, forming the said .tate into a cake, and-drying the cake.

5. A process for'themanufacture of baseexchanging substancesiin the wet way, con- 'sisting in mixin solutions of alkali metal silicate and alka metal aluminate, producing a precipitate-in the form of a elly or jelly-paste by using the saidreagentsin extremeldilution, washing the said precipi tate, andpasSing the precipitate through a 4 filisier press to produce a cake and drying the cae.-

6. A process for the manufacture of baseexchanging substances in the wet-way, consisting in mixin solutions. of alkali metal a precipitate in the form of a elly or pas tel )y using'the said reagentsin extreme dilution in tha -presence of a larger proportion'of a soluble salt than of both the said-reagents, washing the said precipitate, passing the said a cake, and drying the cake,

7. A process for the manufacture of base- :treme. dilution and in "largerproportion of sodium sulfate than a cake,

precipi- "sisting metal aluminate, roducprecipitate through exchanging'substances in the wet way, consisting in v silicate and alka metal aluminate, producin a precipitate in'the form of a elly or je y-paste by usingthe said reagents in exthe presence of a of both" the said reagents, washing the said precipitate, forming the said precipitate into and drying the cake.

8; A process fort-the manufacture of baseexchanging suhstances in the wet way, conslsting in mixing, together a solution containing alumina and silica and a larger proportion'of a sodium salt than of both the said reagents, producing a precipitate in the form of 'a jelly or jelly-paste by the resulting reaction, and-washing and drying the said precipitate; s

I 9. Approcess for themanufacture of basemixm "sdlutions of alkali metal exchanging substancesfin the wet way, conin mixing vtegether a solution 'containing'alumina alfd'silica and a larger proportion of sodium sulfate than of both the said reagents, producing a precipitate inthe form of a 'jelly or jelly-paste y the resulting reaction, and washing an drying the said precipitate.

10. A product of manufacture, being a precipitated base-exchanging substance 1n the condition of hard grains.

In testimony whereof I have hereunto signedmy name to this s ecification m the presenceoftwo subscribi g witnesses.

" PAUL on BRUNN.

Witnesses:

WILLIAM. EDWARD Evans, ROBERT OWEN HUGHES. 

